LONDON (Reuters) - British Prime Minister Boris Johnson and U.S. President Joe Biden discussed boosting military and economic support to Ukraine on Tuesday as well as the need to end Western reliance on Russian oil and gas, a spokeswoman for Johnson's office said.

       "The leaders discussed the need to accelerate assistance to Ukraine, including bolstering military and economic support, as the Ukrainian forces prepare for another Russian onslaught in the east of the country," a Downing Street spokeswoman said.

       "The pair also agreed to continue joint efforts to ratchet up the economic pressure on (Russian President Vladimir) Putin and decisively end Western reliance on Russian oil and gas."

       (Reporting by Alistair Smout; Editing by William Schomberg)